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Windows recognizes 1.99 Gb out of the 16 I installed...

I had Vista 32 bit when I upgraded the RAM from 2 Gb to 16 Gb. I was told by a friend that Vista 32 bit only recognizes 2 Gb, so I upgraded to Windows 7 32 bit. The computer STILL only recognizes 1.99 Gb.

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32-bit Operating Systems only have a total of 4,294,967,296 (4GB) worth of addresses that can be assigned. Some of the hardware in the system itself needs some of those addresses as well as the RAM on your video card. The total of of these addresses is subtracted from the total 4,294,967,296 addresses that the system can address. What's left over are the addresses that can be used for system RAM.

first and foremost, the 4gb limit is in reference to the memory limit not ram limit. As such, things such as gddr gpu memory are inclusive of this figure. Whatever remains of this limit is recognized as ram.

to fully utilize the ram installed on your PC you must upgrade to a 64-bit operating system.